diff --git a/network/README.md b/network/README.md
new file mode 100644
index 0000000..4cdfec3
--- /dev/null
+++ b/network/README.md
@@ -0,0 +1,16 @@
+network
+-------
+
+This contains tools to check the network communication in the cluster is ok.
+
+```
+$ kubectl create -f overlay-test.yml
+$ kubectl rollout status ds/overlaytest -w
+# ^ wait until daemon set "overlaytest" successfully rolled out.
+$ ./test-internode-communication.sh
+# If no FAIL within the output log, then everything is fine
+$ kubectl delete -f overlay-test.yml
+```
+```
+source: https://rancher.com/docs/rancher/v2.5/en/troubleshooting/networking/
+
diff --git a/network/overlay-test.yml b/network/overlay-test.yml
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+++ b/network/overlay-test.yml
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+apiVersion: apps/v1
+kind: DaemonSet
+metadata:
+  name: overlaytest
+spec:
+  selector:
+      matchLabels:
+        name: overlaytest
+  template:
+    metadata:
+      labels:
+        name: overlaytest
+    spec:
+      tolerations:
+      - operator: Exists
+      containers:
+      - image: rancherlabs/swiss-army-knife
+        imagePullPolicy: Always
+        name: overlaytest
+        command: ["sh", "-c", "tail -f /dev/null"]
+        terminationMessagePath: /dev/termination-log
diff --git a/network/test-internode-communication.sh b/network/test-internode-communication.sh
new file mode 100755
index 0000000..bfae9c5
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+++ b/network/test-internode-communication.sh
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+#!/bin/bash
+echo "=> Start network overlay test"
+  kubectl get pods -l name=overlaytest -o jsonpath='{range .items[*]}{@.metadata.name}{" "}{@.spec.nodeName}{"\n"}{end}' |
+  while read spod shost
+    do kubectl get pods -l name=overlaytest -o jsonpath='{range .items[*]}{@.status.podIP}{" "}{@.spec.nodeName}{"\n"}{end}' |
+    while read tip thost
+      do kubectl --request-timeout='10s' exec $spod -c overlaytest -- /bin/sh -c "ping -c2 $tip > /dev/null 2>&1"
+        RC=$?
+        if [ $RC -ne 0 ]
+          then echo FAIL: $spod on $shost cannot reach pod IP $tip on $thost
+          else echo $shost can reach $thost
+        fi
+    done
+  done
+echo "=> End network overlay test"